Authorities in Virginia were called to an LA Fitness after the play.
The purported tweets included the repeated use of the N-word and disparaging remarks about women and gays.
The penalty is the highest ever imposed on a company for breaching E.U. rules.
"We did not know whether we would survive," one of the young team members admitted.
The U.S. ally — which is smaller than Connecticut and about as populous as Baltimore — found itself in the president's cross hairs.